Additional Information

Transcription

1 Additional Information 1. Setting Coefficient of Performance (COP) Values for Reference Refrigerator (1) Selection of possible type of cooling systems except project cooling system - Considering the cooling temperature and the cooling capacity, following systems are identified as the possible type of cooling systems if project cooling system is not installed. a) HFC dry expansion system (single loop) b) NH 3 flooded, pump system (single loop) c) HFC/brine system (secondary loop) d) NH 3 /brine system (secondary loop) (2) Collection of COP values of the refrigerator for possible type of cooling systems and identification of reference COP - For each cooling system identified in the process (1), COP values of the refrigerator are collected from manufacturers catalogues. - Among all the possible systems, catalogue values for NH 3 /brine system are not found. However, the COP values for NH 3 /brine system are always lower than those of NH 3 single loop system 1 and it is assumed not to affect the conservative identification of reference COP. i) Individual Quick Freezer (-35 deg. C room temperature) - COP values of refrigerators for possible systems at -35 deg. C (room temperature) are as follows. 1 Brine system requires lower evaporation temperature of primary refrigerant compared to single loop system since heat exchange from the primary refrigerant to cooling air via brine (secondary refrigerant). For this reason, brine system consumes more energy than single loop system to keep the required temperature therefore, COP value of brine system is always lower than single loop system when primary refrigerant is the same for the both systems. 1

4 Fig.A2-2 Frequency of COP at room temp. -25 deg. C - Catalogue COP values are collected from the manufacturers with high market share in Indonesia: manufacturer A, manufacturer B, manufacturer C, manufacturer D, manufacturer E and manufacturer F. - Range of refrigeration capacity found in the manufacturers catalogues is 14 to 340 kw. - The most frequent range of COP values of all the refrigeration capacity is between 1.60 and 1.65, and the maximum value is From the above, the most likely COP values of refrigerators to be installed at BaU basis are assumed to be between 1.60 and Considering the conservativeness, the COP value for the reference refrigerator is set as 1.71, applicable for the refrigerators with capacity up to 340 kw. 2. Assurance of Net Emission Reductions - Table A1 shows the comparison of the project cooling system and other possible type of cooling systems. - Net emission reductions can be assured as follows: a) Values higher than BaU COP are selected as the reference COP. b) Emissions from power consumption of pumps for the secondary refrigerant or oil are not counted in the emission calculations. Emissions from HFC leakage is not counted for HFC dry expansion system and HFC/brine system as the reference emissions. 4

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